process the meaning of the words in your head as you're moving on to the next few words... basically, don't read like this:
you see:......cat.............eats.................food.......
brain see:..........cat...............eats...................food
more like this:
you:.......cat..eats..food.....dog...eats...cat....
brain:...........cat..eats...food.......dog..eats..cat....
at least, that's what I do, more or less. read phrases, not individual words. learn to identify words quickly, and get the meaning of a sentence - don't memorize the context, or remember the exact wording.